File.



E. A. DUNN FILE.

' AVPPLIOATION FILED Smm 14, 1910. BBNEWBD APR.22,1913.

atented Bec. i6, MNA-3 EDWARD A. DUNN, OF NEWTON, MASSACHUSETTS.

FILE.

speeincationof Letters Patent.

Patented Dec. 16,1913.

pplication le September 14, 1910, Serial No. 581,982. Renewed April 22,1913. Serial No. 762,936.

papers relating to certain persons or mattersv in a filing case lordrawer.

The object of the invention is to strengthen or stiffen such a folder atthe point where the identification name or symbol of theA file isapplied, Without increasing the weight or thickness of the file as awhole in the least, thereby enabling a folder to be made as a whole ofrelatively light and thin stock,

While being at the4 same time greatly strengthened at the portion Wherethe name or symbol occurs and Where the folder is most frequentlygrasped and handled.

Another object is to make the edge of the folder or file which issubjected to handling rounded and smooth, merging gradually with thefaces of the stock on a continuous curve, instead of presenting rawedges and sharp corners.

In the accompanying drawings I have illustrated various forms in whichthe invention may be embodied, these forms all having the same essentialprinciple.

Figure l represents one form of the file or folder in which thereinforcement is made by folding over theedge of the back of the folderand pasting down the flap thus formed against the back. Fig. 2represents a third form in which the back of the folder is reinforced atits edge in the manner shownin Fig. l, and is cut to provide a tab. Fig.3 represents a fourth form in which the back of the folder is reinforcedonly at the tab. Fig. 4 represents the blank from which the form showninFi 3 is made.

The same reference characters indicate the same parts in all thefigures.

nThe article to which the invention relates is the folder or filecommonly used in business to preserve all the papers relating to certainparticular matters togethen Such folders are generallymade of material-havingthe necessary qualities of toughness and stiffness, such asManilapaper.Y The folder as a whole is represented byia and the back orrear leaf thereof by 6.! 'This back is longer or higher than the frontleaf either throughout its entire width, or for a limited extent. Theprojecting part of the back is adapted to bear the name of the person orof the matters to which the contents of the file relate. This part ofthe folder is subjected to a much greater amount of handling than anyother part, particularly in the course of searching through a cabinetfor any particular lfile tucked between others, and it is the purpose ofthis invention to reinforce such part locally. In the form shown in Fig.1 this reinforcementis made by providing the back of the folder with aflap c Which is doubled against the back and pasted down. The verticalextent of the Hap is relatively slight as compared. to the entire heightof the file, and preferably is such that when thefile is empty andclosed the front 'leaf Will not overlap it, whereby it does not increasethe lthickness of the le in the slightest. Thus the file is given morethan double strength in the part where strength is most needed, withoutrequiring the use of heavy stock.

In Fig. 2 the back Z1 is provided with a tab d', which is reinforced bya flap e. The latter ismade in one piece with the back,

and is doubled over against the same and.

pasted. The dotted line f represents the original line of fold. Afterthe flap is thus secured the folded edge of the back is cut away, asrepresented in full lines in Fig. 2, leaving only the tab to projectabove the front leaf, this tab and the entire upper portion of the backbeing, however, strengthened and reinforced by the flap.

In Fig. 3 the folder is provided with reinforcement only at and adjacentto the tab. Here the reinforcement consists of a flap' g, which, whenthe blank for the folder is cut, extends beyond a tab 7L.' vWhen the tabis folded over upon the dotted line z' shown in Fig. 4, a reinforced tabintegral with the folder back, and having an integral reinforcement, ismade, as shown in Fig. 3.

In each embodiment of the invention the 'reinforcement is Wholly aboveeither the twice as heavy andbulky stock, but occupying only 'half thespace. From a practical thing desired. For instance, the symbol' may bestampedor marked directly 4on the Atabor edge,-as shown in Fig. l, lorit may l be made on a label pasted thereto, 4or it may vthe stock ofwhich. the file is formed.

be applied v on the surface of the `folder back, as. 'shown in Figs. 2and 3, being made visible through an opening 7c left in the reinforcingflap.

It will be noted that whether the entire `upper edge of the. folderback,as 'shown in Fig. l, or the upper edge of the tab, as shown in Figs.-2,8 and 4, is made by folding over a part of the stock, such edge issmooth and rounded, merging with the front and rear surfaces of thefolder back on a smooth curvature instead of being' divided therefrom bysharp corners. Thus such edge, which is the part subjected to handling4when't-he files are being vlooked over in Xa case, is protected in thefullest possible manner againstwear. It is obvious that where thebackedge is cut and so presents a raw edge, the wear is greater thanwhen the edge is rounded by folding over a part pf l t the same time thethickness of the file is not increased. The part of the back edge whichis folded over is made to adhere permanently to the folder back, aspreviously mentioned, hencethe edge to Which attention has just beencalled is not subjected to back and forth bending with consequentliability of breaking and'tearing, such as would be the case if thefolded-over part or flap Were not thus permanently and adherently unitedto the back of the file.

I claim,-- l. A file wrapper or folderhaving a back,

' an'integral edge portion of such back being folded flat against theback, whereby a transversely roundedeXtreme edge of double thickness isprovided, the'entire foldededge portion being adherently secured to thesaid back, whereby the saidv wrapper or folder 'is' not onlypermanentlyreinforced, but lthe rounded formy of the eXtreme edge is maintained,and the front being shorter than the back to such an extent that itsupper edge may lie .beneath the bottom of the foldedv over portionwhenthe folder is empty and closed, whereby to make the folder ofuniform thickness vfrom top edge to bottom.

2. A file Wrapper -or folder having a front and a back, and a iapintegral with the upper edge of the back folded flat against the backand pasted'thereto, the front being shorter than thel distance betweenthe lower edge of the flap andthe bottom of thefolder, whereby to llieunder the flap Y pasted thereto, said Hap having an apers ture throughwhich a name or other indi' cation applied to the baclrmay be seen.

4. A file wrapper or folder including front and back leaves, the backleaf having a proj ectingf tab formed integrally with the back andreinforced by an integral extension of the back doubled over at the topedge of the tab and pasted to the back.

5. A Wrapper or folder having a back, an integral extension of suchback. being folded against the back and permanently secured thereto byan adhesive, a part'of the upp'er folded edge of the back being cut awayand leaving aI projecting tab, the outer edge portion of which istransversely rounded, and the Itab being thereby formed integral' withthe back and of double thick-

